We recommend that you use a sturdy, smooth, hardwood hoop. We offer the following ones from Germany. They come in three different sizes and will last a lifetime.
For our 3 inch x 3 inch kits,
you'll need a 5 or 6 inch hoop. Our 8.5 inch hoop is twice as thick and therefore sturdier for larger projects.

hardwood hoop3 inch x 5/16 inch
$5.00SOLD OUT

hardwood hoop5 inch x 5/16 inch
$8.00SOLD OUT

hardwood hoop6 inch x 5/16 inch
$10.00SOLD OUT

hardwood hoop8.5 inch x 5/8 inch
$15.00SOLD OUT

We also recommend that you tightly wrap the inner ring of your hoop with our 100% cotton 1/2" twill tape.
This will protect your embroidery fabric from marking.